scripts that run when we type startx

Hi,

I need to execute my program when Xserver is loaded( ie when we type startx 
from text mode). So can anybody specify the shell script into which i can 
incorporate my executable, so that whenever Xserver is loaded my application 
also runs during the loading.

I tried to incorporate my executable in /etc/profile file but it works only 
when your runlevel is 5 during booting ie in /etc/inittab ur runlevel is 5. 
So what is the option for me to run my executable application when my 
starting run level is 3 ie textmode so that my application runs when Xserver 
is loaded.

Please suggest me some solution, which script can be edited to load run my 
executable application after